499997161 has 8 divisors (see below), whose sum is σ = 524756160. Its totient is φ = 475489872.

The previous prime is 499997143. The next prime is 499997189. The reversal of 499997161 is 161799994.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 499997161 - 2¹¹ = 499995113 is a prime.

It is a super-2 number, since 2×499997161² = 499994322016119842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (499997111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58851 + ... + 66808.

It is an arithmetic number, because the mean of its divisors is an integer number (65594520).

Almost surely, 2^499997161 is an apocalyptic number.

It is an amenable number.

499997161 is a deficient number, since it is larger than the sum of its proper divisors (24758999).

499997161 is a wasteful number, since it uses less digits than its factorization.

499997161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125855.

The product of its digits is 1102248, while the sum is 55.

The square root of 499997161 is about 22360.6162929379. The cubic root of 499997161 is about 793.6990237707.

The spelling of 499997161 in words is "four hundred ninety-nine million, nine hundred ninety-seven thousand, one hundred sixty-one".